"This sock ensemble is designed to transfer moisture from the skin to the boot, to provide insulation from heat and cold, to provide "stand-off" from the boot, to decrease friction on the skin, to prevent blisters, and to prevent lace irritation on the top of the foot."

These socks should be worn with the nap facing out so the smooth surface of the outer sock is against the smooth outer side of the liner sock.  This provides a low coefficient of friction between the socks, not on the skin surface to help prevent blisters.

There is a misconception that you need thin socks in the heat of the summer.  Thick socks provide insulation from heat as well as from cold.  Evaporative cooling occurs from the liner sock into the nap of the thick sock so the skin surface stays cool & dry.

 With this three-sock ensemble, fit the boots over the Coolmax liner and the Heavyweight boot sock first.  If you need to wear the Lightweight boot sock adjust the inside volume of the boot with a Poron® insole.

Remember that sock density and thickness is determined by body weight plus load plus environment.  This three-sock ensemble is designed to provide you with a wide range of use. Use the Load-Temperature Chart to select the proper "Environmental Sock System".

Dr. Murray Hamlet